| Message ID | 20240716150336.2042-5-shiju.jose@huawei.com (mailing list archive) |
|---|---|
| State | RFC, archived |
| Headers | show |
| Series | EDAC: Scrub: Introduce generic EDAC RAS control feature driver + CXL/ACPI-RAS2 drivers | expand |
On Tue, Jul 16, 2024 at 04:03:28PM +0100, shiju.jose@huawei.com wrote: > From: Shiju Jose <shiju.jose@huawei.com> > > Add support for GET_SUPPORTED_FEATURES mailbox command. > > CXL spec 3.1 section 8.2.9.6 describes optional device specific features. > CXL devices supports features with changeable attributes. s/supports/support/ Fan > Get Supported Features retrieves the list of supported device specific > features. The settings of a feature can be retrieved using Get Feature > and optionally modified using Set Feature. > > Signed-off-by: Shiju Jose <shiju.jose@huawei.com> > --- > drivers/cxl/core/mbox.c | 27 ++++++++++++++++++ > drivers/cxl/cxlmem.h | 61 +++++++++++++++++++++++++++++++++++++++++ > 2 files changed, 88 insertions(+) > > diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c > index 2626f3fff201..9b9b1d26454e 100644 > --- a/drivers/cxl/core/mbox.c > +++ b/drivers/cxl/core/mbox.c > @@ -1324,6 +1324,33 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds) > } > EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL); > > +int cxl_get_supported_features(struct cxl_memdev_state *mds, > + u32 count, u16 start_index, > + struct cxl_mbox_get_supp_feats_out *feats_out) > +{ > + struct cxl_mbox_get_supp_feats_in pi; > + struct cxl_mbox_cmd mbox_cmd; > + int rc; > + > + pi.count = cpu_to_le32(count); > + pi.start_index = cpu_to_le16(start_index); > + > + mbox_cmd = (struct cxl_mbox_cmd) { > + .opcode = CXL_MBOX_OP_GET_SUPPORTED_FEATURES, > + .size_in = sizeof(pi), > + .payload_in = &pi, > + .size_out = count, > + .payload_out = feats_out, > + .min_out = sizeof(*feats_out), > + }; > + rc = cxl_internal_send_cmd(mds, &mbox_cmd); > + if (rc < 0) > + return rc; > + > + return 0; > +} > +EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL); > + > int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, > struct cxl_region *cxlr) > { > diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h > index 19aba81cdf13..b0e1565b9d2e 100644 > --- a/drivers/cxl/cxlmem.h > +++ b/drivers/cxl/cxlmem.h > @@ -530,6 +530,7 @@ enum cxl_opcode { > CXL_MBOX_OP_GET_LOG_CAPS = 0x0402, > CXL_MBOX_OP_CLEAR_LOG = 0x0403, > CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0x0405, > + CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, > CXL_MBOX_OP_IDENTIFY = 0x4000, > CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, > CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, > @@ -699,6 +700,63 @@ struct cxl_mbox_set_timestamp_in { > > } __packed; > > +/* > + * Get Supported Features CXL 3.1 Spec 8.2.9.6.1 > + */ > + > +/* > + * Get Supported Features input payload > + * CXL rev 3.1 section 8.2.9.6.1 Table 8-95 > + */ > +struct cxl_mbox_get_supp_feats_in { > + __le32 count; > + __le16 start_index; > + u8 rsvd[2]; > +} __packed; > + > +/* > + * Get Supported Features Supported Feature Entry > + * CXL rev 3.1 section 8.2.9.6.1 Table 8-97 > + */ > +/* Supported Feature Entry : Payload out attribute flags */ > +#define CXL_FEAT_ENTRY_FLAG_CHANGABLE BIT(0) > +#define CXL_FEAT_ENTRY_FLAG_DEEPEST_RESET_PERSISTENCE_MASK GENMASK(3, 1) > +#define CXL_FEAT_ENTRY_FLAG_PERSIST_ACROSS_FIRMWARE_UPDATE BIT(4) > +#define CXL_FEAT_ENTRY_FLAG_SUPPORT_DEFAULT_SELECTION BIT(5) > +#define CXL_FEAT_ENTRY_FLAG_SUPPORT_SAVED_SELECTION BIT(6) > + > +enum cxl_feat_attr_value_persistence { > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_NONE, > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_CXL_RESET, > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_HOT_RESET, > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_WARM_RESET, > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_COLD_RESET, > + CXL_FEAT_ATTR_VALUE_PERSISTENCE_MAX > +}; > + > +struct cxl_mbox_supp_feat_entry { > + uuid_t uuid; > + __le16 index; > + __le16 get_size; > + __le16 set_size; > + __le32 attr_flags; > + u8 get_version; > + u8 set_version; > + __le16 set_effects; > + u8 rsvd[18]; > +} __packed; > + > +/* > + * Get Supported Features output payload > + * CXL rev 3.1 section 8.2.9.6.1 Table 8-96 > + */ > +struct cxl_mbox_get_supp_feats_out { > + __le16 nr_entries; > + __le16 nr_supported; > + u8 rsvd[4]; > + struct cxl_mbox_supp_feat_entry feat_entries[]; > +} __packed; > + > /* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */ > struct cxl_mbox_poison_in { > __le64 offset; > @@ -830,6 +888,9 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd, > enum cxl_event_type event_type, > const uuid_t *uuid, union cxl_event *evt); > int cxl_set_timestamp(struct cxl_memdev_state *mds); > +int cxl_get_supported_features(struct cxl_memdev_state *mds, > + u32 count, u16 start_index, > + struct cxl_mbox_get_supp_feats_out *feats_out); > int cxl_poison_state_init(struct cxl_memdev_state *mds); > int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, > struct cxl_region *cxlr); > -- > 2.34.1 >
diff --git a/drivers/cxl/core/mbox.c b/drivers/cxl/core/mbox.c index 2626f3fff201..9b9b1d26454e 100644 --- a/drivers/cxl/core/mbox.c +++ b/drivers/cxl/core/mbox.c @@ -1324,6 +1324,33 @@ int cxl_set_timestamp(struct cxl_memdev_state *mds) } EXPORT_SYMBOL_NS_GPL(cxl_set_timestamp, CXL); +int cxl_get_supported_features(struct cxl_memdev_state *mds, + u32 count, u16 start_index, + struct cxl_mbox_get_supp_feats_out *feats_out) +{ + struct cxl_mbox_get_supp_feats_in pi; + struct cxl_mbox_cmd mbox_cmd; + int rc; + + pi.count = cpu_to_le32(count); + pi.start_index = cpu_to_le16(start_index); + + mbox_cmd = (struct cxl_mbox_cmd) { + .opcode = CXL_MBOX_OP_GET_SUPPORTED_FEATURES, + .size_in = sizeof(pi), + .payload_in = &pi, + .size_out = count, + .payload_out = feats_out, + .min_out = sizeof(*feats_out), + }; + rc = cxl_internal_send_cmd(mds, &mbox_cmd); + if (rc < 0) + return rc; + + return 0; +} +EXPORT_SYMBOL_NS_GPL(cxl_get_supported_features, CXL); + int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr) { diff --git a/drivers/cxl/cxlmem.h b/drivers/cxl/cxlmem.h index 19aba81cdf13..b0e1565b9d2e 100644 --- a/drivers/cxl/cxlmem.h +++ b/drivers/cxl/cxlmem.h @@ -530,6 +530,7 @@ enum cxl_opcode { CXL_MBOX_OP_GET_LOG_CAPS = 0x0402, CXL_MBOX_OP_CLEAR_LOG = 0x0403, CXL_MBOX_OP_GET_SUP_LOG_SUBLIST = 0x0405, + CXL_MBOX_OP_GET_SUPPORTED_FEATURES = 0x0500, CXL_MBOX_OP_IDENTIFY = 0x4000, CXL_MBOX_OP_GET_PARTITION_INFO = 0x4100, CXL_MBOX_OP_SET_PARTITION_INFO = 0x4101, @@ -699,6 +700,63 @@ struct cxl_mbox_set_timestamp_in { } __packed; +/* + * Get Supported Features CXL 3.1 Spec 8.2.9.6.1 + */ + +/* + * Get Supported Features input payload + * CXL rev 3.1 section 8.2.9.6.1 Table 8-95 + */ +struct cxl_mbox_get_supp_feats_in { + __le32 count; + __le16 start_index; + u8 rsvd[2]; +} __packed; + +/* + * Get Supported Features Supported Feature Entry + * CXL rev 3.1 section 8.2.9.6.1 Table 8-97 + */ +/* Supported Feature Entry : Payload out attribute flags */ +#define CXL_FEAT_ENTRY_FLAG_CHANGABLE BIT(0) +#define CXL_FEAT_ENTRY_FLAG_DEEPEST_RESET_PERSISTENCE_MASK GENMASK(3, 1) +#define CXL_FEAT_ENTRY_FLAG_PERSIST_ACROSS_FIRMWARE_UPDATE BIT(4) +#define CXL_FEAT_ENTRY_FLAG_SUPPORT_DEFAULT_SELECTION BIT(5) +#define CXL_FEAT_ENTRY_FLAG_SUPPORT_SAVED_SELECTION BIT(6) + +enum cxl_feat_attr_value_persistence { + CXL_FEAT_ATTR_VALUE_PERSISTENCE_NONE, + CXL_FEAT_ATTR_VALUE_PERSISTENCE_CXL_RESET, + CXL_FEAT_ATTR_VALUE_PERSISTENCE_HOT_RESET, + CXL_FEAT_ATTR_VALUE_PERSISTENCE_WARM_RESET, + CXL_FEAT_ATTR_VALUE_PERSISTENCE_COLD_RESET, + CXL_FEAT_ATTR_VALUE_PERSISTENCE_MAX +}; + +struct cxl_mbox_supp_feat_entry { + uuid_t uuid; + __le16 index; + __le16 get_size; + __le16 set_size; + __le32 attr_flags; + u8 get_version; + u8 set_version; + __le16 set_effects; + u8 rsvd[18]; +} __packed; + +/* + * Get Supported Features output payload + * CXL rev 3.1 section 8.2.9.6.1 Table 8-96 + */ +struct cxl_mbox_get_supp_feats_out { + __le16 nr_entries; + __le16 nr_supported; + u8 rsvd[4]; + struct cxl_mbox_supp_feat_entry feat_entries[]; +} __packed; + /* Get Poison List CXL 3.0 Spec 8.2.9.8.4.1 */ struct cxl_mbox_poison_in { __le64 offset; @@ -830,6 +888,9 @@ void cxl_event_trace_record(const struct cxl_memdev *cxlmd, enum cxl_event_type event_type, const uuid_t *uuid, union cxl_event *evt); int cxl_set_timestamp(struct cxl_memdev_state *mds); +int cxl_get_supported_features(struct cxl_memdev_state *mds, + u32 count, u16 start_index, + struct cxl_mbox_get_supp_feats_out *feats_out); int cxl_poison_state_init(struct cxl_memdev_state *mds); int cxl_mem_get_poison(struct cxl_memdev *cxlmd, u64 offset, u64 len, struct cxl_region *cxlr);